They both have about 600 daily users but...E-M5 users have uploaded 250% more photos suggesting that E-M5 users are getting more out of their cameras. I'm also willing to bet that that more E-M5 users have recently purchased lenses than D7100 users.....

Or it could suggest that D7100 users are busy taking photos instead of uploading to flickr. It also might suggest that D7100 users are actually printing their photos which I'm sure is a wonderful experience unlike printing anything above a 4"x6" with M4/3.